Enum rustc_hir::LifetimeName

pub enum LifetimeName {
    Param(ParamName),
    Implicit,
    ImplicitObjectLifetimeDefault,
    Error,
    Underscore,
    Static,
}

Variants

Param(ParamName)

User-given names or fresh (synthetic) names.

Implicit

User wrote nothing (e.g., the lifetime in &u32).

ImplicitObjectLifetimeDefault

Implicit lifetime in a context like dyn Foo. This is distinguished from implicit lifetimes elsewhere because the lifetime that they default to must appear elsewhere within the enclosing type. This means that, in an impl Trait context, we don't have to create a parameter for them. That is, impl Trait<Item = &u32> expands to an opaque type like type Foo<'a> = impl Trait<Item = &'a u32>, but impl Trait<item = dyn Bar> expands to type Foo = impl Trait<Item = dyn Bar + 'static>. The latter uses ImplicitObjectLifetimeDefault so that surrounding code knows not to create a lifetime parameter.

Error

Indicates an error during lowering (usually '_ in wrong place) that was already reported.

Underscore

User wrote specifies '_.

Static

User wrote 'static.

Implementations

impl LifetimeName

pub fn ident(&self) -> Ident

pub fn is_elided(&self) -> bool

pub(in hir) fn is_static(
    &self
) -> bool

pub fn normalize_to_macros_2_0(&self) -> LifetimeName

Trait Implementations

impl Clone for LifetimeName

pub fn clone(&self) -> LifetimeName

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LifetimeName

impl Debug for LifetimeName

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<__E: Encoder> Encodable<__E> for LifetimeName

pub fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl Eq for LifetimeName

impl Hash for LifetimeName

pub fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<__CTX> HashStable<__CTX> for LifetimeName where
    __CTX: HashStableContext, 

pub fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

impl PartialEq<LifetimeName> for LifetimeName

pub fn eq(&self, other: &LifetimeName) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &LifetimeName) -> bool

This method tests for !=.

impl StructuralEq for LifetimeName

impl StructuralPartialEq for LifetimeName